Adjustments Standard Version - PIETRO FIORENTINI GOVERNOR 30051 Use And Maintenance Manual

7.5.1 - ADJUSTMENTS STANDARD VERSION

Should it be necessary, for standard regulators with or without slam-shut valve, to change the setting values in order to
increase or decrease the operating pressure, proceed as shown in Tab.7.42:
Step Action
1 Remove the upper cap (A) of the regulator.
Turn the ring nut (B) clockwise:
2 • hourly to increase downstream pressure;
• anti-clockwise to decrease the downstream pressure.
3 Put the upper cap (A) of the regulator back in place.
4 Remove the cap of the slam-shut device (C).
Turn the ring nut (D):
• clockwise to increase the slam-shut valve's cut-in pressure for
5 maximum downstream pressure;
• anti-clockwise to decrease the slam-shut valve's tripping pres-
sure due to maximum downstream pressure.
Turn the ring nut (E) in the direction:
• clockwise to increase the slam-shut valve's cut-in pressure for
5 minimum downstream pressure;
• anti-clockwise to decrease the slam-shut valve's tripping pres-
sure due to minimum downstream pressure.
7 Put the cap of the slam-shut device (C) back in place.
NOTICE!
Minor ± 10% calibration changes with respect to the nameplate value (see paragraph 2.8 "Applied rating
plates") can be made only by adhering to the spring ranges specified in the tables in chapter 10 ("Calibra-
tion tables").
LOW-PRESSURE GAS REGULATOR
EN
Use, maintenance and warning manual
A
B
Fig. 7.16. Operating pressure regulation (Standard version)
| INSTALLATION
A
| REV. A
Necessary equipment
-
Allen key CH 11 mm
-
-
27 mm tubular socket wrench
Slotted screwdriver
-
B
60
Tab. 7.41.
E
C
D